Its hard to answer a question like that without first knowing the structure of the overall network. However usually its as straight forward as plugging the printer into the back of a router. Then...
Check the firewall settings, make sure that the printer and the computer are in the same workgroup. Sometimes you have to enable file and printer sharing even if you are not going to share anything.
You have to change permissions on folders and files for the appropriate sharing of other people on the network. See the related link below for specific instructions.
There are different kinds of printers. Some of them can be connected directly to network. If you have one of them just to that and then using ip address or name of your printer connect to it. If your...